Huawei SmartAX MA5612 Maintenance Manual page 98

SmartAX MA5612 Multi-service Access Module
Maintenance Guide
Procedure
Step 1 Replace the phone and check whether the service is restored.
l
l
Step 2 Check whether the gain of the user port is set properly.
1.
2.
Step 3 Check whether the gain of the DSP chip is set properly.
1.
2.
Step 4 In privilege mode, run the display pstn state command check the status of PSTN ports on the
same service board or adjacent service boards. To be specific, check whether CTPSrvState is
Locked.
l If CTPSrvState is Locked, go to
l If CTPSrvState is not Locked, go to
Step 5 Unblock the blocked ports and check whether the service is restored.
l If the service is restored, go to
l If the service is not restored, go to
Unblock the blocked ports by hanging up the phone or clearing the shorted wires within the same twisted pair.
Step 6 Perform the
Issue 01 (2012-07-25)
If the service is restored, go to
If the service is not restored, go to
In pstnport mode, run the display pstnport electric frameid/slotid/portid command to
check whether Sendgain and Recvgain of the affected port are set properly.
l If they are set properly, go to
l If they are not set properly, go to
Run the pstnport electric set command to set the gain of the affected port again. Then,
check whether the service is restored.
NOTE
Set the gain according to the empirical value. If no empirical value is available, change the gain several
times to different values within the gain range (from small to large) to see if the fault is rectified when the
gain is changed.
l If the fault is rectified when the gain is set to a certain value, go to
l If the fault is not rectified when the gain is set to a certain value, go to
In ESL user mode, run the display mgpstnuser attribute command to check whether the
gain of the DSP chip is set properly.
l If the gain of the DSP chip is set properly, go to
l If the gain of the DSP chip is not set properly, go to
In ESL user mode, run the mgpstnuser attribute set frameid/slotid/portid dsp-input-gain
dsp-input-gain-value dsp-output-gain dsp-output-gain-value command to change the gain
of the DSP chip. Then, check whether the service is restored.
NOTE
Set the gain according to the empirical value. If no empirical value is available, change the gain several
times to different values within the gain range (from small to large) to see if the fault is rectified when the
gain is changed.
l If the service is restored, go to
l If the service is not restored, go to
NOTE
8.4 POTS Subscriber Loop Line Test
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4 Troubleshooting Services Transmitted Through a GE Port
Step 11.
Step 2.
Step 3.
Step 2.2.
Step
Step 11.
Step 4.
Step 5.
Step 6.
Step 11.
Step 6.
with the phone on the hook.
Step 11.
Step
4.
Step 3.2.
3.
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